7-11-3

Distributions

Distribution Command List

Important!

Though list data can be used within the argument of the Distribution function (page 2-8-48), list data cannot be used in the argument of the Statistics Wizard operations described here or in operations that use the Distribution command in the applications.

For details about using list data within the Distribution function, see “Specifying Arguments within the Distribution Function” (page 2-8-48).

kNormal DistributionNormal Probability Density

Menu: [Distribution]-[Normal PD]

Description: This command calculates the probability density of normal distribution from a specified x value. Normal probability density is used for normal distribution.

 

1

 

 

(x μ)2

 

f (x) =

 

e

 

 

( > 0)

 

2σ 2

 

 

 

 

σ

 

2π

 

 

 

 

Definition of Terms

x : data value

: population standard deviation ( > 0)  : population mean

Specifying  = 1 and  = 0 produces standard normal distribution.

Calculation Result Output

prob : normal probability density

Example

Data : 37.5

Population standard deviation : 2

Population mean : 35

Statistics Wizard Operation

(1)On the menu bar, tap [Calc] and then [Distribution].

(2)Select [Normal PD] and then tap [Next >>].

(3)Input values.

(4)Tap [Next >>].

(5)To display the graph, tap $.

20090601